20998620

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{2713}}^1$

素因数の和:2771

約数の個数: 72

約数和(自身を含む): 65201136

約数和(自身を除く): 44202516

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 43, 45, 60, 86, 90, 129, 172, 180, 215, 258, 387, 430, 516, 645, 774, 860, 1290, 1548, 1935, 2580, 2713, 3870, 5426, 7740, 8139, 10852, 13565, 16278, 24417, 27130, 32556, 40695, 48834, 54260, 81390, 97668, 116659, 122085, 162780, 233318, 244170, 349977, 466636, 488340, 583295, 699954, 1049931, 1166590, 1399908, 1749885, 2099862, 2333180, 3499770, 4199724, 5249655, 6999540, 10499310, 20998620]

約数ペア:

[(1, 20998620), (2, 10499310), (3, 6999540), (4, 5249655), (5, 4199724), (6, 3499770), (9, 2333180), (10, 2099862), (12, 1749885), (15, 1399908), (18, 1166590), (20, 1049931), (30, 699954), (36, 583295), (43, 488340), (45, 466636), (60, 349977), (86, 244170), (90, 233318), (129, 162780), (172, 122085), (180, 116659), (215, 97668), (258, 81390), (387, 54260), (430, 48834), (516, 40695), (645, 32556), (774, 27130), (860, 24417), (1290, 16278), (1548, 13565), (1935, 10852), (2580, 8139), (2713, 7740), (3870, 5426)]